A tire sidewall rubber member according to an embodiment is made of a rubber composition containing: a diene rubber; a reinforcing filler containing 75 mass % or more of carbon black; a processing aid; a compound represented by formula (I) (wherein R1 and R2 represent a hydrogen atom, an alkyl group, an alkenyl group or an alkynyl group, and M+ is Na+, K+ or Li+). The processing aid to be used is at least one selected from the group consisting of a fatty acid metal salt, a fatty acid amide and a fatty acid ester, and having a difference (Tm3−Tm1) between a start point (Tm1) and an end point (Tm3) of an endothermic peak measured by a differential scanning calorimeter of 50° C. or more. Thus, tear resistance is improved while maintaining low heat generation properties and hardness.


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    Title :

    TIRE SIDEWALL RUBBER MEMBER AND PNEUMATIC TIRE


    Contributors:

    Publication date :

    2021-09-16


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen



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